private function generateData(): array

    {

        $sources = self::COLORS;

        shuffle($sources);

        $count = count($sources);

        $partCount = $count / 2;

        $parts = [

            array_slice($sources, 0, $partCount),

            array_slice($sources, $partCount, $count)

        ];

        shuffle($parts);

        [$colors, $words] = $parts;

        $data = array_combine($words, $colors);

        return array_slice($data, 0, 5);

    }